Microprocessor 8085 Ppt By Gaonkar __link__ «Must Try»

The 8085 communicates with memory and I/O using its 16-bit address bus and 8-bit data bus. Using memory mapping ( ), the 8085 can address 64 KB of memory (RAM/ROM).

: The 8085 is an 8-bit NMOS microprocessor with a 16-bit address bus capable of addressing 64KB of memory. Architecture Components : ALU (Arithmetic Logic Unit) : Performs 8-bit operations.

Interrupts allow the processor to respond to an asynchronous external event. The 8085 has five hardware interrupts, ordered by priority: (Highest Priority, Non-Maskable) RST 7.5 (Maskable) RST 6.5 (Maskable) RST 5.5 (Maskable) INTR (Lowest Priority, Maskable)

Controls the state of the microprocessor (e.g., NOP , HLT , DI , EI ). Addressing Modes microprocessor 8085 ppt by gaonkar

Executes boolean operations, compares data, or rotates bits (e.g., ANA B , XRA A , CMP M , RLC ).

– Comparison chart listing hardware priorities, vector addresses, and trigger mechanisms.

Gaonkar’s pedagogy emphasizes understanding the 8085 as a collection of interacting functional units. The architecture can be broken down into five primary functional categories. Accumulator and Arithmetic Logic Unit (ALU) The 8085 communicates with memory and I/O using

Slide 3: Functional Block Diagram (The Core of Gaonkar's Approach) 8085 Functional Architecture

Altering the sequence of program execution conditionally or unconditionally (e.g., JMP , JC , CALL , RET ).

Interfacing with peripherals like the 8255 (PPI) or 8259 (Interrupt Controller). Visual Clarity: Architecture Components : ALU (Arithmetic Logic Unit) :

Instruction Cycle, Machine Cycles, and T-States Core Concepts:

A positive-going pulse generated during T1cap T sub 1

A nightmare for students, but essential for engineering interviews. The slides should visually represent:

Lowest priority, non-vectored, maskable interrupt requiring an external hardware device to supply an opcode instruction byte (usually RST or CALL ).